Interestingly, the acronym POIS is remarkably similar one we commonly use to describe a piece of shit. As in, "Right after that POS finished, he claimed he felt 'really sick' and said it would be better if I went home. Then he didn't call me for a week! Claimed he was sick the whole time." Don't worry honey, he's definitely super into you. He probably just suffers from post-orgasmic illness syndrome. You know, like the physical manifestation of sexual regret.